How does the outer rotor axial flow fan reduce noise? Characteristics of noise reduction axial flow fan

The noise problem in the outer rotor axial flow fan has always been a headache. It is necessary to find ways to reduce the noise. At present, there are still many ways to reduce the noise on the market, especially in order to make people's environment better. A noise reduction outer rotor axial flow fan is designed. How to reduce the noise in a specific axial flow fan will be explained below.

The outer rotor axial flow fan is a widely used fan. It is usually used in scenes with large flow and low pressure requirements. It is mainly composed of a fan impeller and a casing. The structure is simple, but the data requirements are high. The axial flow fan is also running. It will produce noise. This kind of noise is basically dipole noise. The noise control of the axial flow fan is also very important. The current management method is:

In terms of aerodynamic performance, 1. minimize the impact of airflow impact and surface separation, avoid or reduce impact noise and eddy current noise. In the design, sharp bumps and sharp turns must be avoided in the flow channel.

2. According to the principle of acoustic impedance mismatch, the muffler is designed and installed at the inlet and outlet of the axial flow fan.

3., the noise level can be effectively reduced by setting the sound absorber at the pipe outlet of the outer rotor axial flow fan.

4., in order to prevent or reduce the noise transmission of the outer rotor axial flow fan, a new sound insulation room (room) has been built in recent years, and the outer rotor axial flow fan is placed in the sound insulation room with sound absorption performance.

The commonly used method in 5. blade modification is blade perforation, which can reduce vortex noise and allow air resistance to pass. Since vortex separation often occurs at the blade outlet, the method of piercing the working wheel blade is usually used. The high-pressure surface of the blade flows to the low-pressure surface of the blade, thereby prompting the separation point of the blade to move down, which reduces the separation area of the blade outlet cross section and reduces noise.

The low-noise axial flow fan is made into a square shape with beautiful appearance, and the square holes reserved on the wall are easy to install. The air outlet is equipped with self-hanging louver to prevent outdoor rainwater and natural wind from flowing back into the room. It has obvious advantages such as firm installation, low vibration, low noise and stable operation.

The above is the introduction of the external rotor axial fan in terms of noise and noise reduction. Through the understanding of this type, people can have more goals in the choice of style series. With this important professional style, people's environment It can become better and better without worrying about noise.

The above is the content of the editor's explanation. I believe everyone has a certain understanding. If you want to know more, please contact us. Thank you for watching. See you next time.